# std::swap(std::match_results)

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< cpp‎ | regex‎ | match results

Defined in header `<regex>` |  |
template< class BidirIt, class Alloc > void swap( match_results<BidirIt,Alloc>& x1, match_results<BidirIt,Alloc>& x2 ) noexcept; |  | (since C++11)

Specializes the std::swap algorithm for std::match_results. Exchanges the contents of x1 with those of x2. Effectively calls x1.swap(x2).

### Parameters

x1, x2 | - | the match_results objects whose contents will be swapped
Type requirements
- `BidirIt` must meet the requirements of LegacyBidirectionalIterator.
- `Alloc` must meet the requirements of Allocator.

### Return value

(none)

### Example

| This section is incomplete Reason: no example

### See also

swap | swaps the contents (public member function)

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